i18n: Add dummy language for checking translation keys (#5785)

tests/integration/dummy_lang_test.go

@@ -0,0 +1,24 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"net/http"
+	"testing"
+
+	"code.gitea.io/gitea/tests"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestKeyLocale(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	req := NewRequest(t, "GET", "/user2/repo1/issues?lang=dummy")
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	newButton := htmlDoc.doc.Find(".list-header-issues > .issue-list-new")
+	assert.Equal(t, "(repo.issues.new)", newButton.Text())
+}